POSITIVE ELECTRODE ACTIVE MATERIAL FOR POWER STORAGE ELEMENT, POSITIVE ELECTRODE FOR POWER STORAGE ELEMENT, POWER STORAGE ELEMENT, AND POWER STORAGE DEVICE

A positive electrode active material for a power storage element according to one aspect of the present invention is a compound which is represented by formula 1, of which at least a part of the surface is covered with carbon, and of which the half-width ratio of the peak in the charged state with r...

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Bibliographic Details
Main Authors OTANI Shinya, HOSHINO Satoshi, ENDO Daisuke
Format Patent
LanguageEnglish
French
Japanese
Published 12.05.2022
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Summary:A positive electrode active material for a power storage element according to one aspect of the present invention is a compound which is represented by formula 1, of which at least a part of the surface is covered with carbon, and of which the half-width ratio of the peak in the charged state with respect to the peak in the discharged state for peaks corresponding to the (131) plane as observed by a powder X-ray diffraction method using CuKα rays is 0.85 to 1.13, inclusive. Formula 1: LiFexMn(1-x)PO4, where (0≤x≤1) Selon un aspect, la matière active d'électrode positive pour élément de stockage d'électricité de l'invention est telle qu'au moins une partie de sa surface est revêtue d'un carbone. Plus précisément, l'invention concerne un composé représenté par la formule (1) dans lequel le rapport de demi-largeur d'un pic d'état de charge vis-à-vis d'un pic d'état de décharge, dans un pic correspondant à un plan (131) observé par diffraction des rayons X sur poudre à l'aide de rayons CuKα, est supérieur ou égal à 0,85 et inférieur ou égal à 1,13. LiFexMn(1-x)PO4(0≦x≦1) ・・・1 本発明の一側面に係る蓄電素子用正極活物質は、表面の少なくとも一部が炭素により被覆されており、CuKα線を用いた粉末エックス線回折法により観察される(131)面に相当するピークにおいて、放電状態のピークに対する充電状態のピークの半値幅比率が0.85以上1.13以下であり、下記式1で表される化合物である。 LiFexMn(1-x)PO4(0≦x≦1) ・・・1
Bibliography:Application Number: WO2021JP36545